Hello, I'm thinking of buying a computer from Digital Storm, and this prebuilt I want has a i7 920 that is overclocked to 3.8hz. I hear that CPU's usually last 10 years but overclock will decrease it faster. I want to keep this computer for about 7 years because it is a pretty expensive one. How long can I keep this computer? It is a HAF 932 model and has ASETEK liquid cooling